Platform-scale



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Patented June 5, 1883.

Ohm n www NDH (No Model.) 2 Sheets-Sheet 2. I

A. H. BMERY.

. PLATFORM SCALE. No. 278,905. Patented June 5.18853.

FIG.50

N. PETERS, Phono-umagmpher. wnhingfon, D. C,

UNITED STATESl ALBERT n. EMEEY, or NEW YORK, N.

Y., Assicnon rro THE EMERY soALE COMPANY, vOF STAMFORD, CONNECTICUT.

PLATFORM-SCALE.

SPECIFICATION forming part 'of Letters Patent No. 278,905, dated June 5, 1883.

Application filed February 5, 1881. (No model.) I

To all whom it may concern.'

Be it known that I, ALBERT H. EMERY, of the city, county, and State of New York, have invented certain new and useful Improvements in Scales, of which the following is a specification.

The subject of this invention is a platformscale with leverage connections arranged to act upon the beam by an upward thrust. The 1o connections between the platform-levers and thrust bar or column and between the latter and the beam consist of flexible transmittingplates. The bed supporting the platform-levers is flanged for the attachmentof a flanged hollow pillar for supporting the beam-case, the latter being attached to the aforesaid pillar also by flanges and bolts. Annular flexible fixing-plates, secured at their outer edges between the flanged bed and pillar and between the pillar and beam case, and clamped at their inner edges to the thrust bar or column by suitable nuts', stay the column concentrically within the hollow pillar, while permitting `it to move vertically without friction. The flexible transmitting and fulcrum plates of the beam are connected t-heretoby means of a iulcrum-block and clamping-plates and screws, to facilitate putting the parts together and to firmly hold the connections. The joints 5o being substantially frictionless, a frictionbrake-is employed with an adjusting-screw to graduate the friction required. rlhe fnlcrum-head of the beam is made separately from the beam proper and attached thereto by a lug 3 5 and screws, as hereinafter described. `rlhe weight end of the beam is stayed against longitudinal or lateral motion by thin iiexible plates, which do not interfere with its proper vertical movement. It is further connected 4o with an indicator having greater angular motion, and likewise stayed horizontally by thin flexible plates. The suspension -rod of the hanging weights passes through an aperture in the beam adapted to limit its swinging and its upward motion. The indicator-rod carries a sliding weight, which is fixed thereon by means of a set-screw bearing upon a block of rubber or other elastic material, to produce sufficient pressure on the rod tov hold it where it 5o is set without preventing its movement when desired. The point of the rod works within a guide and in proximity to an indicator-plate,

which guide and indicator-plate are connected in one and attached to the beam near its fulcrum end. 5 5

In the accompanying drawings the invention is represented in eleven views, numbered 4S to 53, inclusive. Figure 4S is a central longitudinal ysection ofthe lower part of the scale. Fig.

49 is a plan of a part thereof with the platform 6 0 removed. Fig. 50 is a front elevation of the weigh-beam case open, showing a portion o1' the hollow pillar and supporting-column in section. Fig. 51 is a vertical section ofthe lower portion of the hollow pillar and the end ofthe bed on the line 5l, Fig. 49, showing the pressure-column and parts of its attachments in elevation. Fig. 52 is a horizontal section on the line 52, Fig. 50. Fig. 53 is avertical transverse section on the line 53, Fig. 50. Fig. 54 is a front elevation of the fulcrum-head of the beam with a portion ofthe beam attached thereto. Fig. 55 is a plan ofthe same, Fig. 56 is a transverse section on the line 56, Fig. 55, showing the fulcrum-head in elevation: Fig. 57 is a vertical section of an adjustable sliding weight provided with elastic frictionpad and set-screw. Fig. 5S is an elevation o' the connected guide and indicator-plate.

The bed 361 is supported on wheels 362,and 8O' is constructed with a iianged end, 363, for the attachment of a iianged hollow pillar, 364, by means of screws or bolts 365. rlhehollow pillar 364, Figs. 50 and 51j, is flanged also at its0 upper end, 366, for the attachment of the s 5 beam-case 367 by screws or bolts 368. The beam-case is preferably 'constructed with hinged front, 369, Figs. 50, 52, and 53. The platform 370 rests by lugs 371-upon levers 372 373, Figs. 48 and 49, through the medium of 9o flexible metallic plates 374 375, which are clamped to the said lugs 371, and to one end of each of the said platform-levers. The levers 372 373 rest by ful Crum-plates 37 6 on the cross beams or lugs 37 of the bed, these ful- 95 crums being placed between the end fulcrums of the levers. The main lever 372 may be made in one piece, of A form. The levers 37 3 are parallel bars connected by flexible plates 378 to the main lever 372 at a point midway roo between the two fulcrums 37 6, and the short ends of all the levers are equal to each other,

so that a load on either end or on any part ol' the platform will have an equal efiect on the main lever 372.

The platform 370 and the levers 372 and 3T3 are fixed against loi'igitudinal movement by the iiexible stay-plates 430, which are in the saiiie horizontal plane with the fixed fulcrums o t' the levers and connected to the platform by lugs 370L and to the frame by lugs 361". By putting these stay-plates iii the same horizontal plane with these fulerums there will be no side-thrust from these plates produced by the vertical movement ot' the platform.

rllhe t'ree end of the lever 372 is connected by a flexible plate, 379, with a lng, 380, attached adjustably to the lower end ot' the tl'irkust bar or column 81, and fixed in posii on said column by a lock-nut, 382. he l "ver end of the column 381 is held eoncciitrie'ally within the hollow pillar 361i by an annlglar ilexible fixing plate' or diaphragm, 383, pig, outer edge oi: which is clamped between hp connecting-flanges oi the pillar and the bca-l, and the inner edge ot' which is clami'icd Hgtween lock-nuts 384. l

The upper end oi" theV column 381v 1s constructed with an enlarged flange or head, and

held .coneentrically within the .hollow pillar Abya fixing-plate, 385, clamped at its outer edge lili i C011 colineeting-ilanges ot' the hollow pilap and the beam-case, and at its inner edge bp, ween the nutor screw collar So and the llbnige or head o1 the column. y ,llhe weigh-beam 3ST is constructed with a removable head, 38S, secured thereto by the .lolngitudiii al and transverse screws 389 39() 391. tllhown in dotted lines in Figs. 5l and 55.) T ie head 388 is formed, as shown in Fig. 5i, yUith acavity underneath, and an oblique or beyeled shoulder, 392, t'or the reception of a iLlCrum-bloek, 393, oi' the peculiar shape sltown in Fig. 50, which is attached to the `l'fejani-case through the medium oi' a lexible plate, 3M, and a block, S95, with suitable clainping-serews, as shown.

' f"|",' l`lie i'iilcrum-piece 393 adapted to receive t'wo drawingscrews, 390, Fig. 50, which are passed through the apertures :59T in the beam slio Fig. 55 and indicated by dotted lwn in lilies in Figs. 54- and 5b. By tightly drawing up' the 't'ulcrum-piece $93 by means oi" the scilews 396, the tlexible transmittiiig-plate 39S, constitutiiig the connection between the colli'ii'nn SSL and the beam 3ST, is securely clamped .'to-`4 the said beam, having been previously fclamlpicd in the upper end ot' the column SSI. the thin-plate connections adapt the levers, I "olumn, and beam to move without friction, a brake is p rovi ded to apply any desired friction toelicek the movement. This brake may bear upfon the levers, thrust-bar,or beam,'or, being rconnected to any such moving part, may bear .upon any :uljacent stationary part. As shown `ii`i"fthe present illustration, it consists ol' an eastic plate, 300, Fig. .30, fastened by a screw, `400, to the pressure-column, and bearing at its tree end against the point ot' a screw, 401, .the

' adjustment ol which in the hollow pillar lvaries the pressure and consequent friction as desii-ed.

The beam-case is provided with a shell', 4:02, for the reception o't'the main weights .L0.},which are applied to the suspension-rod l0-.t in cus toiiiary manner. This rod is suspended i'roni the extremity ot' the beam through the medium of a link or staple, 05, pivoted to apair ol' clamp-plates, 00, which connect with the end 'of the beam through a thin flexible plate or plates, 407, clamped to the said beam by a bracket, `40S. To the bracket 40S are also elampedhorizontal thin tlexiblc plates lili), at tached at 410 to the beaiii-case, so as to stay the beam against longitudinal or lateral liori zontal movement, while permitting it sut'iif cient vertical play without friction. rllhe. link or staple 05 passes through an apcrtu re in the beam-ease, and the hook ol" the rod 404-, 4by which the latter hangs to said link or staple, occupies a cavity in the under side oi' the beam case, as indicated by dotted lines in Fig. 53, so as to limit the ujljiward movement ot' the hook and prevent thehorizontal motion ol' the staple beyond the elastic limits ot' the suspending plate -l-OT without .interfering with the swing ot' the weight'siispending irod.

The weight end oli' the beam is connected by thin flexible plates 411 aud clamp-plates 41:2 with the bracket 4113, which is suspended by ilexible plates hllll and clamps .Ll to the beamcase, asshown in Fig. 50, to constitute the i'ulcrum oi' the iiulieator-rod dit, which is iixed adjustably in said bracket by a set-screw, 41T.

The indicator-rod fulcram-bracket -l-,lf is stayed against horizontal movement by thin exible plates 41.8, clamped to the said bracket and to the beam-case.

lli) is a stud or standard mounted ad]- ust ably on therearproie tion oi' theindicator-rod, and carrying a vertically-adjustable weight, 420. The indicator-rod carries a tare or balance weight, 421, which issecured in position by a set-screw, 422, bearing on a block, 1.23, ot

leather, cork, Ior other elastic material, Fig. 5T, adapted to press upon the rod without indentation with suiiicient i'orce to hold the weight securely in any position in which it may be set, while permitting its Aii'ree adjustment by hand. The, end ot' the rod works within a slotted guide, 424, and iii proximity to an in dicator-plate, 425. The guide and indicatorplate are :formed or connected in one, as illus trated inv Figs. 50, 52, 5S, with a base Ailange i'or the attachment ot' the connected plates to the t'ulcrum-head ot' the beam by means ol' the screws 5396. 420 relnesents a sliding weight used in connection with the grad nations shown at the upper edge of the beam in Fig. T0.

v The beam is provided with a weight-rod. 27, carrying a light weight, 42S, l'or fractional weighing, in connection with the second graduated scale, and carrying also a tare orbalance weight, 429.

Whatever novel subject-matter lf have set I'orth and not claimed or attempted to claim herein I have claimed or attempted to claim in other applications or have reserved to be claimed in future original applications.

The following is claimed as new:

1. In combination with the bed 361 or supporting-pieces 377, the platform 370, and the platform-levers 372 373, the thin connecting and fulerum plates 374 375 376, arranged as herein shown, with the plates connecting the levers to the bed intermediate between the ends of said. levers, so that pressure on the platform will p ro duce an upward thrust on the free end of the lever 372, as set forth.

2. In combination with the platform 370, its levers 3.7 2 37 3, and frame 361, the flexible stayplates 430, to prevent horizontal motion of the platform, arranged in the same horizontal plane with the fixed fulcrums of the levers, substantiallyT as, set forth.

3. rIhe combination of the bed, the platform levers, and thin flexible compression-plate 379, applying an upward pressure to the beameolumn, as set forth.

4. The platform'370 and levers 372 37 3, directly connected by thin plates, in combination with the thrust or compression bar 381, the scale-beam 387 and the compression-plates 379 398, secured by clamp-plates, substantially as and for the purposes set forth.

The combinationof the platform-levers 372 373, the platfornrbed 361, the flanged pillar 364, the fixing plate 383, and the beam pressure column suitably connected to the main platform-lever, substantially as and for the purposes set forth.

6. The combination, with the flanged pillar 364, bed361, beam pressure column 381, and fixing-plate 383, of the lock-nuts 384, for fastening the plate to the column, as set forth.

7. The combination of the clamping-nut 386 with the thin plate 385 and pressure-column, as and for the purposes set forth.

8. rlhe combination of the flanged pillar1A head 366, the` beam case secured thereto, the pressure column 381, the diaphragm 385, clamped between the pillar head and ease, and the nut 386, for fixing the diaphragm to the pressure-column, as set forth.

9. In combination with the pressure-column.

381, fixing-diaphragm 385, and weigh-beam 387 the fulerum piece 393 and thin plates 398 394, as herein set forth.

10. The combination ofthe thin plate 394, clamp-plates thereof, and fulerum-block 393 with the case 367, with or without the intermediate attaching-block, 395, as and for the purposes set forth.

11. The combination of an adjusting-screw,

401, with the friction-brake 399, pillar364, and

bar or column 381, substantially as and for the purposes set forth.

12. In combination with the beam-head 388, shoulder 392, fulerum block 393, and thin plate 398, the draw-screws 396, operating substantially as and for the purposes set forth.

13. The beam 387, made separately from its fulcrum-head 388, and attached thereto by the projecting lug 391rL and screws 389 390 391.

14. A scale beam or lever secured against longitudinal motion by one or more fiexible vplates attached to it and to another suitable part of the scale.

15.- The thin flexible plate or plates 409, connecting the weight end of the beam to the case or frame, to fix it against longitudinal or lateral motion, as explained.

16. lhe thin flexible plate or plates 418, connecting the fulerum-piece of a supplemental beam or indicator-rod with the case or frame, substantially as and for the purposes set forth.

17. The weight rod 404 and attaching link or stirrup 405, connected as shown, and having their point of connection within an aper ture in the case, which limits their motion ,substantially as set forth.

18. In combination with a weight sliding on a rod or beam, 416, the fixing-screw 422 and elastic f'rictioirpiece 423, substantially as set forth.

19. rIlhe connected guide and indeX- plate 424 425, attached to the stationary frame or beam near the fulerum of the latter, for use in connection with the indicator rod 416, as herein set forth.

' ALBERT H. EMERY.

Vitnesses: v

OcrAvIUs KNIGHT, MAHLON RANDOM? 

